Two Local Ready-Mix Cement Manufacturers,Here and There,have Combined Demand Given

Two local ready-mix cement manufacturers,Here and There,have combined demand given by Q = 105 - P.Their total costs are given by TC_Here = 5Q_Here + 0.5Q²_Here and TC_There = 5Q_There + 0.5Q²_There.If they successfully collude,their maximum joint profits will be:

A) $500.
B) $1,000.
C) $1,600.
D) $2,000.
E) $2,500.